JPH0486632A - Camera using extrusion type film cartridge - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in a camera that uses a push-out film cartridge containing everything including the leading edge of the film.

(Background of the Invention) Conventionally, in a camera film feeding device, when the leading end of the film protruding from the film cartridge (so-called leader part) is engaged with the sprocket or film take-up spool of the camera, the sprocket or Film was loaded by driving the film take-up spool. However, with this type of film, the leading edge of the film must be manually set, which is not only cumbersome, but if the leading edge of the film is set incorrectly, the film may not be loaded properly, or the leading edge of the film may be accidentally set. The drawback is that pulling the film exposes it to light and makes it unusable.

Therefore, in recent years, the following new type of film cartridge has been proposed in US Pat. No. 4,834,306.

A film passing slit, a film fixed to a supply spool at one end and wound around the supply spool, and a regulating part regulating the radial expansion of the outermost periphery of the film arranged coaxially with the supply spool; a holding member that prevents the film from substantially contacting the inner wall of the film cartridge; a release portion that deforms a portion of the holding member to continuously release the outermost peripheral portion of the film from the radial restriction of the holding member; It is equipped with a guiding part that guides the part of the film released from regulation to the film passing slit, and prevents slipping between the outer periphery of the film and the holding member due to the expansion of the outermost periphery due to loosening of the film caused by rotation of the supply spool in the film extrusion direction. The drive force is applied to the film in the extrusion direction, thereby making it possible to extrude the film from the film cartridge. Hereinafter, a film cartridge from which film can be ejected by rotating the supply spool will be referred to as a push-out film cartridge.

FIGS. 26 to 28 are views showing this extruded film cartridge, with FIG. 26 being a longitudinal sectional view thereof, FIG. 27 being a transverse sectional view thereof, and FIG. 28 being a side view of the main parts.

In these figures, 301 is a film, 3゜2 is an extruded film cartridge, 303 is a film passing slit, 304 is a supply spool, and 304a is a film 30.
A fixing part for fixing one end of 1, 305 is a holding member, 305
306 is a release portion, and 307 is a guide portion.

If this extrusion type film cartridge 302 is used, after loading into the camera, the supply spool 304 of the cartridge 302 is rotated by a fork, and the film 302 is
1 is ejected, the film 301 is pushed out until it is wound around the camera's film take-up spool, and then the film 301 is fed by the film take-up spool. Since there is no need to touch the tip, the drawbacks of the conventional method are eliminated.

By the way, in a camera using this extrusion type film cartridge 302, if the film is not normally wound onto the film take-up spool within a predetermined time after the cartridge 302 is loaded and the film is driven to extrude as described above. A proposal is to always wind up all the film 301 in the cartridge 302 (the state shown in FIG. 27) and then start the film extrusion drive again from the beginning (
U.S. Pat. No. 4,834,306).

However, in the case of a configuration in which the film 301 is completely wound into the film cartridge 302 and then the film extrusion drive is performed again every time the film winding fails as described above, there are the following problems.

In other words, if the film is successfully pushed out from within the film cartridge 302 but the subsequent winding onto the film take-up spool fails, the leading edge of the film may have come out to the aperture but then retracted. Not only does this increase the probability of failure in otherwise successful film extrusion, but it also wastes time.

(Objective of the Invention) The object of the present invention is to solve the above-mentioned problems, eliminate the need to repeat this operation again when the film extrusion is successful, and prevent film extrusion failure by performing a new film extrusion. To provide a camera using an extrusion type film cartridge that can prevent problems such as incurring problems and wasting time.

(Features of the Invention) In order to achieve the above object, the present invention comprises: a speed detection means arranged near the aperture to detect the moving speed of the film; If the first speed is not detected by the speed detecting means by the time the timer means and the first timer means finish counting the first predetermined time, it is assumed that autoloading has failed and the rewinding of the film is started. a second timer means that starts a counting operation simultaneously with the start of the rewinding operation;
If the second speed is detected by the speed detecting means during the counting operation of the second timer means, it is determined that the film has been successfully pushed out from within the film cartridge, and the speed detecting means detects the second speed. a first determining means that continues film rewinding until no speed is detected, and then instructs the fork to push out the film again; and a first determining means that causes the speed detecting means to detect no speed at all after film rewinding is started. If so, it is determined that the film has failed to be pushed out from within the film cartridge, and the film is continued to be rewound until the second timer means finishes counting the second predetermined time, and then the fork is instructed to push out the film again. and a speed detection means arranged near the aperture to detect the moving speed of the film; and a first timer means for starting a counting operation from the start of film extrusion by the fork; If the first speed is not detected by the speed detecting means before the first timer means finishes counting the first predetermined time, the film may not be pushed from within the film cartridge successfully and autoloading may fail. a first determining means that starts rewinding the film and instructs the fork to push out the film again after the waist rewinding operation;
If the first speed detection is performed by the speed detection means before counting the predetermined time of If the second speed detection is performed by the speed detection means during the operation of the timer means, it is determined that the winding on the film winding spool is successful;
If the second speed detection is not performed during the operation of the second timer means, it is assumed that autoloading has failed, and film rewinding is started, and during the film rewinding, the speed detection means detects a zero speed. and a second determining means which, when detected, instructs the fork to extrude the film again, thereby determining whether or not the film has been extruded from within the film cartridge according to the speed detection state of the speed detecting means disposed near the aperture. The present invention is characterized in that the amount of film wound into the film cartridge is controlled according to the result of this determination.

(Embodiments of the Invention) Hereinafter, the present invention will be described in detail based on illustrated embodiments.

13 to 18 are diagrams showing the mechanical configuration of each embodiment of the present invention, in which FIG. 13 is a perspective view of a film feeding mechanism, FIG. 14 is a plan view of a gear train at the time of film winding, FIG. 15 is a plan view of the gear train during film rewinding, FIG. 16 is a cross-sectional view of the one-way clutch, FIG. 17 is a cross-sectional view thereof, and FIG. 18 is a cross-sectional view of the main parts of the camera.

In these figures, the reference numeral ``■'' indicates a film drive motor, which rotates in the normal direction (in the direction of arrow C in FIG. 15) when winding the film, and rotates in the reverse direction (in the direction of arrow C in FIG. 15) when rewinding the film. 2 is a pinion gear fixed to the rotating shaft of the motor 1. 3 is a first sun gear, which is connected to the pinion gear 2;
It meshes with the. Reference numeral 4 denotes a first planetary gear, which meshes with the first sun gear 3. 5 connects the first sun gear 3 and the first planetary gear 4, and rotatably holds the first planetary gear while generating frictional force between the first planetary gear 4 and the first planetary gear 4; This is a first connection lever in which the rotation of the first sun gear 3 causes the first planetary gear 4 to revolve around the first sun gear 3 as the rotation center. The first sun gear 3, first planetary gear 4, and first connection lever 5 constitute a known planetary gear mechanism.

Reference numeral 6 denotes a spool gear that meshes with the first planetary gear 4 only when the film drive motor 1 rotates normally. A film take-up spool 7 is fixed to the spool gear 6 and moves integrally with the spool gear 6.

8 is a first idler gear that always meshes with the first sun gear 3; 9 is a first two-stage gear that has a large gear portion 9a and a small gear portion 9b, and the large gear portion 9a meshes with the first idler gear 8; , 1o is the small gear portion 9b of the first two-stage gear 9
11 is a third idler gear that meshes with the second idler gear 1°; 12 is a second sun gear that meshes with the third idler gear 11;
13 is a second planetary gear that meshes with the second sun gear 12. 14 is a third planetary gear, which, like the second planetary gear 13, meshes with the second sun gear. 15
The second sun gear 12, second planetary gear 13, and third planetary gear 14 are connected by arms 15a and 15b, respectively, and each planetary gear is held rotatably while generating frictional force. This is a second coupling lever in which the rotation of the second sun gear 12 causes the second planetary gear 13 and the third planetary gear 14 to revolve around the second sun gear 12 with the second sun gear 12 as the rotation center. Said second sun gear 12 and 2.3
With the planetary gears 13, 14 and the second connecting lever 15,
It constitutes a known planetary gear mechanism.

16 is the fourth idler gear, which is connected to the film drive motor 1.
During normal rotation, the second sun gear 12 of the second coupling lever 15
When the motor l rotates to the left around the center, it engages with the second planetary gear 13, but does not engage with the third planetary gear 14. When the motor l rotates in the reverse direction, the rightward rotation of the second coupling lever 15 engages the third planetary gear. It meshes with the planetary gear 14 and the second planetary gear 13
The gears do not mesh with each other. 17 is a second two-stage gear which has a large gear part 17a and a small gear part 17b, and the large gear part 17a meshes with the fourth idler 16; 18 is a large gear part 18
a and a small gear part 18b, the large gear part 18a meshes with the small gear part 17b of the second two-stage gear 17; 19 is the small gear of the third two-stage gear 18; Part 18
a fork gear meshing with b; 20 is the fork gear 1;
9 rotates the supply spool within the film cartridge 33 (see FIG. 18), thereby extruding and winding the film 34 from within the cartridge nozzle 33.

21.22.29 (see Figure 16) is a one-way clutch, 21 is a gear that meshes with the second sun gear 12, 2
As shown in FIG. 17, 2 is a ratchet gear in which a full-circumference pawl portion 22a is formed on the inside and a gear 22b is formed on the outside; 29 is a ratchet pawl member, and the pawl portion 29 has elasticity;
b, and its claw portion 29b engages with the claw portion 22a of the ratchet gear 22. The relative speed of the ratchet pawl member 29 with respect to the ratchet gear 22 is in the direction of the arrow (14th
(see figure), this ratchet pawl member 29
When the relative speed is opposite to the direction of the arrow, the pawl portion 29b bends and slides on the pawl portion 22a, and the ratchet pawl member 29 transmits the driving force to the ratchet gear 22. I can't tell you. As shown in FIG. 16, the ratchet pawl member 29 has a pin 29a, and the pin 29a fits into the hole 21c of the gear 21.
The ratchet pawl member 29 and the gear 21 always rotate together. Reference numeral 30 denotes a base plate (not shown), on which the gear 21, the ratchet pawl member 29, and the ratchet gear 22 (21b, 29c, 22c) are rotatably fitted, respectively, as shown in FIG. Reference numeral 23 denotes a roller member fixed to the ratchet gear 22, and the outer peripheral portion 23a has a structure to prevent rubber, knurling, etc. from slipping.

24 is a pulse gear, and the gear portion 22 of the ratchet gear 22
meshes with b. A pulse plate 25 has a conductive part 25a and a non-conductive part 25b, and is fixed on the pulse gear 24. 26 and 27 are contact pieces, which connect the conductive portion 25 of the pulse plate 25.
This is a contact piece for detecting pulses corresponding to the amount of rotation of the roller member 23 using the non-conducting portion 25a and the non-conducting portion 25b.

Reference numeral 28 denotes a stopper (see FIG. 15) fixed to a base (not shown), which restricts the counterclockwise rotational position of the first connecting lever 5 by coming into contact with the end 5a of the first connecting lever 5. There are things.

31 is a main body (see FIG. 18), 32 is a pressure plate, 35 is a cartridge chamber, and 36 is a spool chamber.

A magnetic head 48 is attached to the pressure plate 32.

The roller member 23 mentioned above is arranged as shown in FIG.
In order to stably contact the magnetic head 48 (the magnetic gap portion thereof), the magnetic head 48 is attached in advance so as to apply a predetermined pressure, or the film 34 is attached between the magnetic head 48 and the roller member 23. When passing between the magnetic head 48 and the roller member 2, a predetermined pressure is applied to the magnetic head 48 depending on the thickness of the film 34.
It is installed with a gap between it and 3. As can be seen from the above, the roller member 23 constitutes one film feeding system, and rotates as the film 34 moves, and in conjunction with this, the pulse plate 25 also rotates through the gear 22. The contact pieces 26 and 27 generate pulse signals.

In the above configuration, after the film cartridge 33 is loaded into the cartridge chamber 35, when the film drive motor l (pinion gear 2) is rotated in the direction of arrow B (normally rotated) as shown in FIG. The first sun gear 3 rotates clockwise, and the first planetary gear 4 revolves clockwise around the first sun gear 3 due to the action of the first coupling lever 5. Eventually, it meshes with the spool gear 6, the driving force of the film drive motor 1 is transmitted to the spool gear 6, and the film take-up spool 7 begins to rotate clockwise.

Further, the driving force is transmitted through an idler gear 8, which is another gear that meshes with the first sun gear 3, to a second gear through a first two-stage gear 9, a second idler gear 10, and a third idler gear 11. is transmitted to the sun gear 12. Therefore, since the second sun gear rotates counterclockwise, the action of the second coupling lever 15 causes the second planetary gear 13,
The third planetary gear 14 revolves counterclockwise around the second sun gear, and soon the second planetary gear 13 moves to the fourth planetary gear.
It comes to mesh with the idler gear 16 of. As a result, the driving force of the film driving motor 1 in the B direction is
The driving force is transmitted to the idler gear 16 as a counterclockwise driving force, and is further transmitted to the fork gear 19 via the second two-stage gear 17 and the third two-stage gear 18, so that the fork 20 rotates clockwise.

Furthermore, as the second sun gear rotates as described above, a driving force in the clockwise direction (in the direction of the arrow) is applied to the gear 21 that meshes with the second sun gear 12, so that the film is wound on the spool 7. Gear 21 until it arrives. Ratchet gear 22. Due to the action of the one-way clutch composed of the ratchet pawl member 29, the one-way clutch rotates integrally (details will be described later), and accordingly, the roller member 2
3 will also rotate clockwise. As the ratchet gear 22 rotates, the pulse gear 24 that meshes with it also rotates, and the pulse plate 25 and contact pieces 27, 26 generate a pulse signal corresponding to the amount of rotation of the roller member 23, as shown in FIG. Encoder circuit shown in (described later)
The rotational speed and amount of rotation of the roller member 23 (feeding speed and amount of the film 34), etc. at that time are determined.

Here, the gear ratio of the gear train is configured as follows.

If the peripheral speed of the film take-up spool 7 is rVIJ, the peripheral speed of the roller member 23 is rV2J, and the speed of the film 34 pushed out from the film cartridge 33 by the fork 20 is "■3", then the relationship rVl>V2>V3J holds. be.

As the film 34 is pushed out from the film cartridge 33 by the clockwise rotation of the fork 2o,
Since the roller member 23 is configured to constantly press the magnetic storage portion of the film 34 against the magnetic head 48,
The leading edge of the film contacts the roller member 23 and the magnetic head 48.

Here, according to the configuration of this embodiment, since the roller member 23 is rotating clockwise, the film 34 and the roller member 2
The frictional force of 3 allows the leading edge of the film to be smoothly fed from the cloth to the left in FIG. Moreover, since the rotational speed is configured as rV2>V3J, when the film 34 is fed out by the roller member 23 after this,
The driving force (speed) is transmitted through the film 34 to the fork gear 19, the third two-stage gear 18, the second two-stage gear 17, and the fourth idler gear 16 in this order, and then to the second planetary gear 1.
3 clockwise rotational speed than the fourth idler gear 16
The rotation speed in the counterclockwise direction becomes faster, but at this time, the fourth idler gear 16 jumps the second planetary gear 13,
The second planetary gear 13 and the fourth idler gear 16 are momentarily disengaged, and the speed difference is absorbed.

The film 34 is further fed out, and the film 34
When the film 34 is wound around the film take-up spool 7 by means of hooking the perforations of the main body or pressing the film 34 against the film take-up spool 7 provided on the main body side, due to the relationship rV 1>V2>V3J The roller member 23 is rotated by the frictional force with the film 34, and the roller member 23 rotates faster than the gear 21. However, due to the action of the one-way clutch mentioned above, the rotational force of the roller member 23 is rotated faster than the gear 21. I can't convey it to you. Also at this time, the pulse plate 25 and contact pieces 26, 27
Based on the pulse signals generated, the feed amount, speed, etc. of the film 34 can be determined by the encoder circuit shown in FIG. Furthermore, since there is a relationship rV 1 > V 2 J, the feeding speed changes greatly when the film 34 is wound around the film take-up spool 7, but by focusing on this speed change, it can be determined whether autoloading has finished or not. It is also possible to determine.

Next, the operation when rewinding the film will be explained.

To explain this operation with reference to FIG. 15, when the film drive motor 1 is rotated in the direction of arrow C, the first connecting lever 5
The first planetary gear 4 revolves around the first sun gear 3 in a counterclockwise direction until the end 5a of the first connecting lever 5 comes into contact with the stopper 28. Therefore, the first planetary gear 4 and the spool gear 6 are disengaged.

Also, at this time, the second sun gear 12 rotates clockwise,
As a result, the second planetary gear 13 and the third planetary gear 14 are connected to the second sun gear 12 by the action of the second connection lever 15.
The fourth idler gear 16 and the second planetary gear 13 are disengaged, and the fourth idler gear 16 and the third planetary gear 14 are engaged instead.

Therefore, the fork gear 19 rotates counterclockwise, and the fork 20 causes a supply spool (not shown) inside the film cartridge 33 to rotate in the opposite direction, so that the film 34 is wound into the cartridge 33.

At this time, the roller member 23 is rotated counterclockwise by the film 34, but the second sun gear 12
Since the speed at which the gear 21 is rotated counterclockwise is high, the gear 21 is at a relative speed or in a counterclockwise direction (opposite to the direction of the arrow) with respect to the ratchet gear 22. Therefore, the one-way clutch mechanism rotates the gear 21 from the ratchet gear 22 to the gear 21. No driving force is transmitted to.

As the film 34 is wound into the film cartridge 33 in this way, the leading edge of the film eventually passes through the roller member 23 and the roller member stops rotating, so there is no pulse between the pulse plate 25 and the contact piece 2627. After the signal is no longer generated and the film rewinding operation continues for a certain predetermined time, the motor is stopped and the film rewinding operation is completed (details will be described later).

The results of detecting the feeding amount and speed of the film 34 are used, for example, to synchronize with the magnetic head 48 during magnetic recording and to perform desired magnetic storage at a predetermined position in the magnetic storage section. Furthermore, it can also be used to control the feeding of one frame of film 34 and to write information using optical means such as LEDs.

19 and 20 are diagrams showing other configuration examples of the one-way clutch mechanism made of the above-mentioned 212229. FIG. 19 shows the gear train when winding the film, and FIG. 20 shows the gear train when rewinding the film. FIG.

In these figures, 42 is a third sun gear that meshes with the second sun gear 12, and 43 is a fourth planetary gear that meshes with the third sun gear 42.

44 connects the third sun gear 42 and the fourth planetary gear 43, and when the third sun gear 42 rotates counterclockwise, the fourth planetary gear 43 connects the third sun gear 42. The third sun gear 42 revolves counterclockwise as the rotation center.
This is a third connecting lever that causes the fourth planetary gear 43 to revolve clockwise when rotated clockwise. 45 is a gear that meshes with the fourth planetary gear 43, and the roller member 2
3 are integrally attached. Further, this gear 45 meshes with the pulse gear 24. 46 is a stopper that restricts the counterclockwise rotation of the third connecting lever 44.

As in the embodiment described above, the circumferential speed of the film take-up spool 7 and the roller member 23 and the speed of the film 34 pushed out by the film 20 are set as rV 1 >V2>V3J, so that the film 34 is is wound on the film winding Lisbourg 7, the gear 45 is moved clockwise via the roller member 23 to the third sun gear 4.
However, since the fourth planetary gear 43 is thrown in the direction of the arrow, the difference in speed is absorbed.

When rewinding the film, the third sun gear 42
Since the meshing between the planetary gear 43 and the gear 45 is released (
20), the film 34 is wound into the film cartridge 33 by the fork gear 19.

Further, in FIG. 21, the film feeding amount is detected using the pulse plate 25 and the contact piece 2627, but here an example is shown in which the film feeding amount is detected optically using a photointerrupter or the like using the pulse gear 24. ing.

In FIG. 21, reference numeral 48 indicates a photo-in club plate, and 47 indicates a slit disk made of a light-shielding material, which is fixed to the pulse gear 24 and has a slit 47a formed therein.

In the above configuration, the slit 47a is detected by the photo ink clubter 47, and a pulse signal corresponding to the amount of rotation of the roller member 23 is generated.

Further, the shape and mounting position of the roller member 23 as a film pressing member are desirable as described below.

22 is a sectional view of the magnetic head 48 and the roller member 23, where 48a is a magnetic gap, 48b is a core, and 48c is a sectional view of the magnetic head 48 and roller member 23.
is the coil.

That is, in this embodiment, the film 34 is attached to the magnetic head 48.
Since the roller member 23 is configured to rotate even when it is not on the top, dust (shavings) generated at that time may enter the magnetic gap 48a of the magnetic head 48, or the magnetic gap 48a may be rubbed. Since it is conceivable that the shape may be loose, it is preferable to use a shape as shown in FIG. 23, for example.

FIG. 23 is a diagram showing a longitudinal section, and 49 is a roller member, which consists of a large diameter part 49a and a small diameter part 49b, and the large diameter part 49a
The small diameter portion 49b is in contact with a portion other than the core 48b of the magnetic head 48 or the magnetic gap 48a provided at its tip, that is, the magnetic gap 48a, the core 4
A portion facing 8b is a small diameter portion 49c to prevent direct contact between the roller member and the magnetic gap.

Further, as shown in FIG. 24, the roller member 5° is moved so that the roller member 5° comes into contact with the magnetic gap 48a at a location other than the magnetic gap 48a.
0 and the magnetic gap 48a may be shifted by an interval.

Furthermore, if the installation is in the position shown in Figure 24 above,
As shown in FIG. 25, a roller member 50 is moved around the magnetic head 48 by an elastic means such as a spring so as to press the magnetic storage portion of the film 34 against the magnetic head 48 with a stable force.
It is desirable to apply force in eight directions.

In FIG. 25, 51 is a fourth coupling lever that is rotatable around the second sun gear 12 and that rotatably holds the gear 21 and engages the gear 21 and the second sun gear 12. It can operate completely independently of the second connection lever 15. 52 has one end attached to the base plate (not shown) and the other end attached to the fourth interlocking lever 51, and pushes the roller member 50, gear 21, etc. in the direction of arrow E, that is, the roller member 50 is pushed against the magnetic head 48 with a constant force. It is biased to attach.

FIG. 1 is a block diagram showing a first embodiment of the present invention.

In FIG. 1, reference numeral 101 denotes a photometer for measuring the brightness of a subject to be photographed, and numeral 102 denotes a distance measuring means for measuring the distance to the subject in order to focus the photographic lens.

A microcomputer (hereinafter referred to as microcomputer) 103 controls the operations of various circuits. A switch 104 is turned on in conjunction with the first stroke of a release button of a camera (not shown), and is hereinafter referred to as switch SW1. 105 is a switch that is turned on in conjunction with the second stroke of the release button, and hereinafter this will be referred to as release switch SW2. Reference numeral 106 indicates a back cover switch that is linked to the opening and closing of the back cover, and 107 indicates a cartridge presence/absence switch whose state changes depending on whether or not the film cartridge 33 is loaded in the cartridge chamber 35.

108 is the pulse plate 25 and contact piece 26 shown in FIG.
This is an encoder circuit that detects the pulse signal generated by the roller member 27, and is used as information for determining the rotational speed and amount of rotation of the roller member 23 (feeding amount of the film 34). 109 is a motor control means for controlling the rotation of the film feeding motor 1;
The film is wound up by normal rotation (rotation in the direction of arrow C in FIG. 15), and the film is rewound by reverse rotation (rotation in the direction of arrow C in FIG. 15). 110 is a shutter control means;
Controls exposure to film. Reference numeral 111 denotes a lens control means, which controls the lens barrel based on information from the distance measuring means 102 so that the subject is in focus. 112
1 is a head control means for controlling the writing or reading of information into a magnetic storage section (not shown) provided on the film 34 using the magnetic head 48 shown in FIG. 13 and the like.

FIG. 2-1 and FIG. 2-2 are flowcharts showing the operation of the microcomputer 103, and the operation will be explained below according to these.

"Step 1" It is determined whether the back cover of the camera is closed based on the state of the back cover switch 106, and when it is determined that the back cover is closed, the process proceeds to step 2.

"Step 2" The film cartridge 33 is inserted into the cartridge chamber 35 according to the state of the cartridge presence/absence switch 107.
It is determined whether or not it has been loaded, and by determining that it has been loaded, the process proceeds to step 3.

"Step 3" Since the film cartridge 33 has been loaded, a winding start signal is sent to the motor control means 109 here. This causes the film drive motor 1 to switch to the first
4, as shown in FIG.
Extrusion from No. 3 is started.

"Step 4" By inputting a pulse signal corresponding to the rotation of the roller member 23 from the encoder circuit 108 and performing calculations with an internal clock signal, the roller member 23
The rotational speed V and acceleration of where N is the number of counts of the pulse signal in a predetermined period of time. Alternatively, if the time interval between pulse signals is T, then the following equation is obtained.

"Step 5" It is determined whether or not the rotational acceleration of the roller member 23 obtained in step 4 above is changing rapidly. Determine that it has been rolled up and proceed to step 1
Go to 00.

At this point, due to a sudden change in the rotational acceleration of the roller member 23, the film 34 is moved to the film take-up spool 7.
The reason why it is determined that it has been wound up will be explained below.

The relationship between the feeding speed of the film 34 and the rotational speed of the roller member 23 is shown in FIG.

In FIG. 3, after the film cartridge 33 is loaded, film winding (extrusion) is started at time To. The portion shown by a thin solid line is the rotational speed of the roller member 23, and the portion shown by a broken line is the moving speed of the leading end of the film during extrusion by the fork drive. In reality, there is some speed fluctuation due to load fluctuations, but this is not shown in the diagram as it can be ignored from the perspective of the whole.

The period from time TO to T1 is the period of film extrusion,
A delay (TI') occurs in the start of movement due to the absorption of loose winding of the film 34 within the film cartridge 33. The period from time T1' to T1 is the period during which the fork 20 actually pushes out the film 34, and the rotational speed of the fork 20 determines the film feeding speed during this period. During this time, the roller member 23 rotates at a speed determined by the rotation of the film drive motor 1 and the gear ratio of the driving force transmission gear train up to the roller member 23.

The leading edge of the film reaches the roller member 23 at time T1, and thereafter the film 23 is drawn out according to the rotational speed of the roller member 23 until it reaches the film take-up spool 7. At this time, as mentioned above, the fork 20
The film extrusion drive will be invalidated.

The leading edge of the film is fed to the film take-up spool 7 from time T1 to T2, and the film 34 is wound around the film take-up spool 7 at time T2. That is, a sudden change in the speed of the roller member 23 means that the film 34 is wound around the film take-up spool 7 and begins to rotate at a speed according to the spool 7. Thereafter, the film is wound up to a predetermined position (the position where the l thoracic gyrus reaches the aperture portion) according to the rotational speed of the film take-up spool 7. At this time, the driving force of the roller member 23 also becomes invalid.

When the first frame reaches a predetermined position, the motor control means 109 stops winding the film, and at time T3, the film take-up spool 7 also stops. Further, when the shooting of the first frame is completed, winding of the film starts from time T4 toward the second frame.

Further, in this step 5, when the rotational speed of the roller member 23 is not changing rapidly, the process proceeds to step 6.

"Step 6" The rotational speed V of the roller member 23 is approximately r
It is determined whether it is OJ or not, and if it is "0", it is determined that the leading edge of the film is caught somewhere and the rotation of the motor 1 has stopped, and that the fork 20 and roller member 23 are not rotating, and the step After the autoloading failure sequence from step 8 onwards, the process returns to step 3 and the film extrusion drive is attempted again. Further, if rotation of the roller member 23 is confirmed in step 6, the process proceeds to step 7.

"Step 7" It is determined whether or not a predetermined time ta has elapsed since the start of film winding. If the predetermined time ta has not been exceeded, the process returns to step 4. On the other hand, if no increase in the rotational speed of the roller member 23 due to the winding of the film around the film take-up spool 7 is detected even after the predetermined time ta has elapsed, the process proceeds to step 8. Note that the predetermined time ta is the third
This is a slightly longer time than the time interval between time T0 and time T2 in the figure. In other words, this is the time expected to be sufficient from the start of film extrusion until the film is wound around the film take-up spool 7. That is, if the predetermined time ta or longer is exceeded, it may be considered that autoloading has failed.

"Step 8" Start a timer that counts a predetermined time tb. This predetermined time tb is slightly longer than the time interval between time T0 and time T1 in FIG. 3, provided that the winding and rewinding speeds are the same.

"Step 103" The operation of winding the -H film 34 into the film cartridge 33 is started in order to attempt film winding (extrusion) again.

That is, rewinding of the film is started via the motor control means 109.

"Step 104" A pulse signal is input from the encoder circuit 108, and the rotational speed V of the roller member 23 during the film rewinding operation is calculated.

"Step 1o5" Determine whether the rotational speed V obtained in step 104 above is greater than "0", and rOJ
If it is larger (this means that autoloading has failed between the roller member 23 and the film take-up spool 7), the process advances to step 108, and if rOJ (this word reaches the roller member 23). It is assumed that autoloading has failed in the previous steps (for example, film extrusion).The process proceeds to step 106.

"Step 106" Here, it is determined whether or not the timer started in step 8 has finished counting the predetermined time tb. If the timer has not finished counting, the process returns to step 104. If the timer has finished counting, It is assumed that up to the leading edge of the film 34 has been wound up, and the process proceeds to step 107.

"Step 107" Here, the film rewinding operation is stopped via the motor control means 109.

If it is determined in step 105 that the rotational speed V of the roller member 23 is greater than "0", the leading edge of the film 34 passes the position of the roller member 23 and reaches the spool chamber 36, as described above. After that, it is considered that winding onto the film take-up spool 7 has failed, and in this case, the process proceeds to step 108.

"Step 108" Here, the encoder circuit 10 is again
The pulse number is input from 8, and the rotational speed V of the roller member 23 is calculated.

"Step 109" It is determined whether the rotation speed V obtained in step 108 is rOJ or not. If it is not rOJ, the process returns to step 108. If it is rOJ, it is determined that the leading edge of the film has passed the position of the roller member 23. It is determined, and the process proceeds to step 107, where rewinding of the film is immediately stopped.

As a result, film rewinding is stopped before the leading end of the film is wound into the film cartridge 33. In other words, the movement of the film 34 is stopped in a state where the film has been successfully extruded.

Further, in step 5, if the rotational speed of the roller member 23 suddenly changes (the state at time T2 in FIG. 3), the process proceeds to step 100 as described above.

"Step 100J: In order to read information such as the prescribed number of films and film sensitivity written in the magnetic storage section of the film 34, the magnetic head 48 is driven via the head control means 112 to start reading the information.

"Step 9" The encoder circuit 108 detects the value of the pulse signal that is counted.

“Step IOJ Here, the encoder circuit 10
It is determined from the count contents of step 8 whether or not the first frame has arrived at the aperture area, and the process continues in step 9 until the first frame reaches the aperture area.
．． Repeat step 10. When it is determined that the first frame has reached the aperture portion, the process proceeds to step 11.

"Step 11" Here, the drive of the film drive motor 1 is stopped via the motor control means 109, and the winding of the film is stopped.

When the above operations are completed, the flow advances to step 12 in FIG. 2-2.

"Step 12" Here, it is determined whether the first stroke of the release button has been made and the switch SWI has been turned on. The process proceeds to step 13 by determining whether the switch SW1 is on.

"Step 13" Drive the photometric means 101 to measure the brightness of the subject (obtain photometric information).

"Step 14" The distance measuring means 102 is driven to calculate distance information (distance measurement information) to the subject.

"Step 15" Here, it is determined whether the second stroke of the release button has been made and the release switch SW2 has been turned on. If it is determined that the release switch SW2 is turned on, the process proceeds to step 17, and if it remains off, the process proceeds to step 16.

"Step 16" Here, as in step 12, it is determined whether the switch SWI is on or not. If it is off, the process returns to step 12, and if it remains on, step 1 is determined.
5 and waits for the release switch SW2 to be turned on.

"Step 17" Based on the distance measurement information obtained in step 14, the lens control means 111 is driven to move the photographic lens to the in-focus position.

"Step 18J: Drive the shutter control means 110 based on the photometric information obtained in step 13 above,
Exposure control to the film 34 is performed.

"Step 19" In order to position the next frame in the aperture area, winding of the film is started via the motor control means 109 and the film drive motor 1.

"Step 20J: A pulse signal is input from the encoder circuit 108, and the rotation speed V and rotation amount (film feeding amount) of the roller member 23 are calculated.

"Step 21" Determine whether the rotational speed of the roller member 23 obtained in step 20 above is approximately rOJ,
If it is not "0", that is, if the film is being wound, the process advances to step 22.

"Step 22" It is determined whether the count in the encoder circuit 108 has reached the amount of feeding one frame of film. If not, the process proceeds to step 101.

"Step 1o1" Here, the writing frequency for recording information to the photographic frame is determined based on the pulse signal from the encoder circuit 108 (details will be described later).

"Step 102" Information is written into the magnetic storage portion of the film 34 being fed by the magnetic head 48 via the head control means 112 in accordance with the above writing frequency.

Further, in step 22, the encoder circuit 10
If it is determined that the count at step 8 has reached one frame of film, the process advances to step 23.

"Step 23" The drive of the film drive motor 1 is stopped via the motor control means 109, and the winding of the film is stopped. Step 1 to prepare for the next shoot
Return to 2.

If the rotational speed of the roller member 230 is approximately "0" in step 21, it is assumed that the film has been stretched and the photographing of all frames has been completed, and the process proceeds to step 24.

"Step 24" The drive of the film drive motor 1 is stopped via the motor control means 109, and the winding of the film is stopped.

"Step 25" Here, in order to start rewinding the film (winding it into the film cartridge 33), the film drive motor 1 is driven in the direction of arrow C in FIG. 15 via the motor control means 109.

"Step 26" A pulse signal is input from the encoder circuit 108, and the rotational speed υ of the roller member 23 is calculated.

"Step 27" It is determined whether the absolute value of the rotational speed υ of the roller member 23 obtained in the above step 26 is greater than "0", and if it is "0", the process returns to the step 26 and again. The rotational speed V of the roller member 23 is calculated. Thereafter, if the rotation of the roller member 23 is detected to be greater than "0", the process proceeds to step 28.

The determination flow in step 27 is provided because if the film 34 wound around the film take-up spool 7 is loosened during initial rewinding, the roller member 2
3, because there is a delay in the movement of the film 34 being transmitted,
This is to avoid confusing this with the end of film rewinding.

"Step 28" A pulse signal is input from the encoder circuit 108, and the rotation speed V of the roller member 23 is calculated.

"Step 29" Determine whether the rotational speed V of the roller member 23 obtained in step 28 above is "0" or not, and if it is not rOJ, return to step 28 and repeat the same operation until rOJ is reached. .

Thereafter, if it is determined that the rotation speed V of the roller member 23 is "0", that is, the rotation of the roller member 23 has stopped, it is determined that the leading edge of the film has passed the position of the roller member 23, and the process proceeds to step 30.

``Step 30J: Here, a timer that counts a predetermined time tc is started.

"Step 31" Film rewinding is stopped by confirming that the predetermined time tc has elapsed.

"Step 32" It is determined whether or not the film cartridge 33 has been taken out from the cartridge chamber 35 based on the state of the cartridge presence/absence switch 127. When it is determined that the film cartridge 33 has been taken out, the process returns to step 1 in FIG. 2-2.

FIG. 4 is a diagram in which the rotational speed V of the roller member 23 during film rewinding is shown as a solid line, and rewinding is started at time T5, and the leading edge of the film has passed the position of the roller member 23 at time T6. In the film rewinding direction, the roller member 23 immediately stops due to the friction with the opposing surface. The broken line indicates the moving speed of the leading edge of the film, and the time interval between times T6 and T7 corresponds to the predetermined time tc in step 30.

Figure 5 shows that in step 5 of Figure 2-1, it was determined whether autoloading was successful by looking at the change in acceleration, but as a modification of this, the determination can be made based on the change in average speed. Indicates when to do so.

In FIG. 6, step 3' is provided between step 3 and step 4 in FIG. This is another example in which erroneous determination due to changes in acceleration or speed of the film drive motor 1 at startup is avoided.

FIG. 7 is a circuit diagram showing a specific example of the configuration of the head control means 112 shown in FIG. 1.

In FIG. 7, 2301 is a switching means for connecting the magnetic head 48 to an information reading circuit system or a writing circuit system, and is controlled by an R/W signal. This R/
The W signal is sent from the microcomputer 103,
It is at a high level when reading information. 2302
is a differential amplifier for reading information, and the magnetic head 48
The voltage generated by the 8th
It outputs signals F and G as shown in the figure. 2303 is the signal F.

G is input, and signals H and I as shown in Fig. 8 are output.
This is a comparator that generates a digital signal, and is composed of a comparator with hysteresis. 2304
shapes the output signal H of the comparator 2303 into the signal waveform shown in J in FIG.
This is a waveform shaping circuit that outputs as ATA. 2305 is a driver for writing information, which sends WRITE DATA (signal K) from the microcomputer 103 to the magnetic head 48.
This is a circuit that changes the write current to .

FIG. 9 shows the output signal M of the driver 2305 in response to WRITE DATA (signal K) and the R/W signal that controls the switching means 2301.

FIG. 10 is a circuit diagram for explaining in terms of hardware the method for determining the write frequency performed in step 101 of FIG. 2-2.

In FIG. 10, 2601 is an oscillator that determines the write frequency, and the frequency is controlled by the output of a latch 2602.

The information recording method here is a self-clocking method, and to explain it with the signal in FIG. 9, a rising edge is a clock signal and indicates a division of information. In other words, the falling edge is a data signal, and if the high-level pulse width is less than 1/2 for one cycle of the clock signal, it is one logic level, and if it is greater than 1/2, it is the opposite logic level. It shows the logical level. Therefore, the ninth
The signal in the figure includes, for example, a time series WRI called rollJ.
This means that the TE DATE signal has been input.

The latch 2602 samples the output of the encoder circuit 108 at the timing of the processed signal latch 2603. That is, after the reset signal of the AND gate 2607 is output, the output terminal Q1 of the counter 26o6
until it reaches a high level. Actually, it is latched when the reset signal rises. This is because the reset signal is synchronized with the rising edge of the clock signal, which is one cycle of the write signal, and if the write frequency is higher than the synchronization of the output of the encoder circuit 108, the frequency change during one cycle is caused by the data signal. This is because errors are likely to occur.

The counter 2606 counts the pulses of the oscillator 2601, and the output terminals Qn and Qn+ of the counter 2606 count the pulses of the oscillator 2601.
The logical product of 1 is output from the AND gate 2607, and this is used as the CLO for writing information, for example, to advance the RAM address.
It is used as CK, as a reset signal for latch 2611, and also as the rising edge of WRITEDATA in latch 2611. The falling edge is, for example, RAM
Depending on whether DATA is high level or low level, one of AND gates 2608 and 2609 is selected, and the timing of output terminals Qn and Qn+1 is selected, respectively, and the latch 2611 is set through the OR gate 2610, so that the falling edge Position is controlled.

If the logical result of the outputs of output terminals Qn and Qn+1 is "1", then Qn has a width of 1/3 and Qn+l has a width of 2/3.

FIG. 11 is a flowchart showing the operation in the second embodiment of the present invention.

Note that the film feeding gear train in this embodiment is not of the type shown in FIG. 13 in which the fork, roller member, and film take-up spool are each driven (hereinafter referred to as the FRS drive system). , a type in which a fork and film take-up spool are driven (this is generally called an FS drive system) is assumed. In other words, it is assumed that the roller member 23 shown in FIG. 13 has a mechanism to which no driving force is transmitted from the film drive motor 1.

FIG. 12 is a diagram corresponding to FIG. 3, showing the speeds of the roller member 23 and the leading edge of the film assuming the configuration as described above.

After film winding (extrusion) begins at time T0, the leading edge of the film begins to move with a delay of time T1'.
When the leading edge of the film reaches the position of the roller member 23 at time T1 after extrusion is started, the rotational speed V of the roller member 23 is detected for the first time, and when the film 34 is wound around the film take-up spool 7 at time T2, the above-mentioned rotation speed is detected. Speed■ also increases.

The operation will be explained below using the flowchart shown in FIG. Note that the same step numbers are given to parts that perform the same operations as in FIG. 2-1.

"Step 6'" Here, it is determined whether the rotational speed ν of the roller member 23 is rOJ or not, that is, whether the roller member 23 has started to rotate.If the rotation of the roller member 23 is confirmed, the leading edge of the film is It is assumed that the film has been pushed out from within the film cartridge 33 and has reached the position of the roller member 23 (the film has been pushed out successfully), and the process proceeds to step 111.

"Step 111" Start the timer te for a predetermined period of time. This predetermined time te is the time T1 and T2 in FIG.
In other words, after the leading edge of the film passes the position of the roller member 23, the film winding spool 7
That's enough time for it to wrap around itself.

"Step 112" A pulse signal is input from the encoder circuit 108, and the rotation of the roller member 23 is added "Step 1
13'' If it is determined in step 112 that there has been a change, the autoloading is assumed to have been successful and the operations from step 100 described above are proceeded. If no sudden change is confirmed, the process proceeds to step 114.

"Step 114" Determine whether or not counting of the predetermined time te has ended, and if not, proceed to step 11.
Return to 2. Also, if it is determined that it has finished, step 1
Proceed to step 15.

"Step 115" Rewinding of the film is started via the motor control circuit 109 and the film drive motor 1.

"Step 116" A pulse signal is input from the encoder circuit lo8, and the rotational speed V of the roller member 23 is calculated.

"Step 117" It is determined whether the rotation speed V obtained in step 116 is "0", that is, whether the leading edge of the film has passed the position of the roller member 23, and the roller member 2
If it has not passed the position 3, return to step 116,
Repeat the same action. Further, if it is determined that the position of the roller member 23 has been passed, the process immediately proceeds to step 118.

"Step 118" Here, film rewinding is stopped via the motor control means 109 and film drive motor 1, and the process returns to step 3. As a result, even though the film extrusion has been successful, the film cartridge 3
The leading end of the film stops in a state between the roller member 23 and the fork 20 without being wound into the film.

Further, in step 7, if it is determined that the predetermined time ta has elapsed, that is, if the autoloading fails without the leading edge of the film reaching the position of the roller member 23, the process proceeds to step 110.

"Step 11O" Here, time T1 and T in FIG. 12.

The predetermined time tb corresponds to a time slightly longer than the time interval of
During this time, the film is rewound via the motor control means 109 and the film drive motor 1. As a result, the entire film 34 including its leading end is wound into the film cartridge 33. Thereafter, the process returns to step 3 and film extrusion is attempted again.

According to each of the above embodiments, a means for detecting the moving speed of the film is provided near the aperture of the camera, and when autoloading fails, the output of this means is compared with various predetermined times to determine if the film has failed to be ejected from the film cartridge. Or, the film is successfully extruded but the winding on the film take-up spool has failed. If the winding on the film winding spool has failed, the film is extruded at the point where the leading edge of the film is not wound into the film cartridge. By stopping film rewinding and trying to wind the film again, there is no need to repeat this operation even after successfully extruding the film.
This eliminates the need for new film extrusion failures and wasted time.

(Effects of the Invention) As explained above, according to the present invention, the success or failure of extruding the film from within the film cartridge is determined according to the speed detection state of the speed detection means disposed near the aperture, and the result of this determination is Since the amount of film wound into the film cartridge is controlled accordingly, it is no longer necessary to repeat this operation again even after successfully extruding the film, leading to another failure in extruding the film and wasting time. This makes it possible to prevent people from spending a lot of money.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a first embodiment of the present invention;
Figure-1 and Figure 2-2 are flowcharts showing the same operation, Figure 3 is a diagram showing the leading edge of the film and the speed of the roller member during autoloading, and Figure 4 is the leading edge of the film and the speed of the roller member during film rewinding. 5 and 6 are flowcharts showing a partial modification of FIG. 2-1, and FIG. 7 is a circuit showing a specific configuration example of the head control means shown in FIG. 1. 8 and 9 are diagrams showing the output waveforms of each part in FIG. 7, and FIG. 10 is a diagram showing the output waveform of each part in FIG. FIG. 11 is a flowchart showing the operation of the second embodiment of the present invention; FIG. 12 is a diagram showing the speed of the film leading edge and roller member during autoloading;
3 is a perspective view showing the film feeding mechanism used in each embodiment of the present invention, FIG. 14 is a plan view showing the gear train when winding the film, and FIG. 15 is a plan view showing the gear train when rewinding the film. 16 is a vertical sectional view showing the one-way clutch mechanism shown in FIG. 13, FIG. 17 is a plan view showing the main part configuration of the one-way clutch mechanism shown in FIG. 13, and FIG. 18 is a diagram showing the implementation of the present invention. 19 and 20 are plan views showing other examples of the roller member drive gear train, respectively.
Figure 1 is a vertical cross-sectional view showing another configuration of the pulse signal generation part;
FIG. 22 is a plan view showing the positional relationship between the magnetic head and the roller member shown in FIG. 13, FIG. 23 is a longitudinal cross-sectional view showing another positional relationship between the magnetic head and the roller member, and FIG. FIG. 25 is a plan view showing an example of the configuration of the film feeding gear train in the case of the positional relationship shown in FIG. 24; FIG. 26 is a plan view showing another positional relationship of the members; FIG. FIG. 27 is a longitudinal cross-sectional view of the extruded film cartridge, FIG. 27 is a cross-sectional view thereof, and FIG. 28 is a side view thereof. 1... Film drive motor, 7...
Film winding spool, 20...fork,
23...Roller member, 24...Pulse gear, 25...Pulse plate, 25.26...
... Contact piece, 33 ... Extrusion type 7 type% ... Magnetic head, 49.50 ... Roller member, 103 ... Microcomputer, 108 ...・・・
... Encoder circuit, 109 ... Motor control means, 112 ... Head control means.

Claims (2)

[Claims] (1) In a camera using a push-out film cartridge, which is equipped with a fork that pushes out the film from inside the film cartridge and a film take-up spool that winds up the film pushed out by the fork, the film is moved near the aperture. a speed detection means for detecting a speed; a first timer means for starting a counting operation from the start of film extrusion by the fork; If the first speed detection is not performed by the means, rewinding start instructing means determines that autoloading has failed and starts rewinding the film, and second timer means starts a counting operation simultaneously with the start of the rewinding operation. If the second speed detection is performed by the speed detection means during the counting operation of the second timer means, it is determined that the film has been successfully pushed out from within the film cartridge, and the speed detection means a first determining means for continuing film rewinding until the speed is no longer detected by the fork, and then instructing the fork to push out the film again; and a first determining means for instructing the fork to push out the film again; If not, it is determined that the film has failed to be pushed out from within the film cartridge, and the film is continued to be rewound until the second timer means finishes counting the second predetermined time, and then the film is pushed out again by the fork. A camera using an extrusion type film cartridge, characterized in that a second determination means for instructing extrusion is provided. (2) In a camera using a push-out film cartridge, which includes a fork that pushes out film from inside the film cartridge, and a film take-up spool that winds up the film pushed out by the fork, the film is moved near the aperture. a speed detection means for detecting a speed; a first timer means for starting a counting operation from the start of film extrusion by the fork; If the first speed detection is not performed by the means, it is assumed that the film has not been successfully pushed out from within the film cartridge and autoloading has failed, and the film is started to be rewound. If the first speed detection means detects the first speed by the time the first determination means for instructing film extrusion and the first timer means finish counting the first predetermined time, the first speed is detected from within the film cartridge. The second timer means is started as if the film extrusion was successful, and if the second speed detection is performed by the speed detection means while the second timer means is operating, the winding on the film winding spool is successful. If the second speed detection is not performed during the operation of the second timer means, it is determined that autoloading has failed, and film rewinding is started, and during the film rewinding, the speed detection means A camera using a push-out type film cartridge, characterized in that a second determining means instructs the fork to push out the film again when a speed of zero is detected.